Payment method when I have more tan 1.000 possible users for an App

[Juan_Camilo_Sie]

At the moment I’m creating an app that could be used by more than 1.000 users of more than 10 factories.
How should I deploy the app and in which payment method ?
Becaus the purpose is not to pay for the whole 1.000 people because it would be e really expensive

Thank you in advice

[LeventK]

The data that belong to 10 factories are sensitive in nature?